CN210151589U - Unbalanced continuous beam side span counterweight auxiliary device - Google Patents
Unbalanced continuous beam side span counterweight auxiliary device Download PDFInfo
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- CN210151589U CN210151589U CN201920882501.5U CN201920882501U CN210151589U CN 210151589 U CN210151589 U CN 210151589U CN 201920882501 U CN201920882501 U CN 201920882501U CN 210151589 U CN210151589 U CN 210151589U
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 37
- 239000010959 steel Substances 0.000 claims abstract description 37
- 239000002184 metal Substances 0.000 claims description 19
- 238000010276 construction Methods 0.000 abstract description 29
- 238000000034 method Methods 0.000 abstract description 6
- 238000013461 design Methods 0.000 abstract description 4
- 238000004873 anchoring Methods 0.000 description 8
- 238000012544 monitoring process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
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- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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Abstract
The utility model belongs to the technical field of the bridge construction technique and specifically relates to an unbalanced continuous beam side span counter weight auxiliary device, including side span cushion cap, stretch-draw jack, side span beam section and midspan beam section. The utility model discloses an unbalanced continuous beam side strides counter weight auxiliary device passes through prestressed steel strand wires and stretch-draw jack and installs at side strides roof beam section outside lower extreme, can freely dispose the quantity of design counter weight prestressed steel strand wires as required, position and the anchor degree of depth at the side strides cushion cap, structural design is more reasonable, the top counter weight groove of built-in top counter weight device is seted up at side strides cushion cap upper surface, can carry out accurate counter weight in real time to unbalanced load, whole counter weight construction does not need large-scale hoisting equipment, supplementary constructor demand is few, the operability is high, the continuity is strong, the efficiency of construction is high, construction cycle is short, and the cost is saved, and the construction safety is high.
Description
Technical Field
The utility model belongs to the technical field of the bridge construction technique and specifically relates to an unbalanced continuous beam side span counter weight auxiliary device.
Background
Unbalanced continuous beam must carry out the counter weight at span light beam section side of light weight when the unbalanced beam section of construction for the balanced structure stability in order to guarantee pier shaft and both sides beam section of continuous beam both sides beam section atress. The existing method for counter weight of unbalanced continuous beam is generally used for stacking counter weights such as sand bags, concrete blocks, reinforcing steel bars, water tanks and the like, and has the following disadvantages: (1) the counterweights such as sand bags, concrete blocks, reinforcing steel bars, water tanks and the like need a large amount of construction materials, the manufacturing period of the counterweights is long, a large amount of manpower is consumed, and the material loss is large; (2) the counterweight hoisting operation needs a plurality of persons for matching, large hoisting machinery is needed, the construction period is long, the mechanical loss of the persons is large, and the hoisting risk is high; (3) the weight of the counter weight is inconsistent, the counter weight is not accurately controlled, the counter weight monitoring means is backward, a specially-assigned person is required to monitor the amount in real time, the colleagues consuming manpower are easy to generate weight measurement errors, the linear monitoring is greatly influenced, and the construction safety is difficult to ensure; (4) the unloading process of the counterweight also needs large-scale hoisting machinery and a large amount of manpower, the construction period is long, the disposal difficulty of the counterweight is high, and the construction cost is increased; (5) the traditional counterweight is not continuously loaded and has low weight precision, is difficult to be applied according to various construction load changes of unbalanced beam sections, easily causes unbalance loading of a bridge, influences the linear monitoring of the bridge, and has construction potential safety hazards. Therefore, a device which is easy to manufacture, convenient to construct and accurate and convenient to control the balance weight is continuously arranged on the market.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: in order to solve the problems in the prior art, an improved auxiliary device for an unbalanced continuous beam side span counterweight is provided, which solves the problems in the prior art.
The utility model provides a technical scheme that its technical problem adopted is: the side span counterweight auxiliary device of the unbalanced continuous beam comprises a side span bearing platform, a tensioning jack, a side span beam section and a middle span beam section, wherein a plurality of longitudinal assembly through holes are formed in the side span beam section, an upper metal corrugated pipe with a built-in prestressed steel strand is inserted into each longitudinal assembly through hole, the upper end of each prestressed steel strand penetrates through the interior of the tensioning jack and is connected with the tensioning jack, a longitudinal assembly blind hole is formed in the upper surface of the side span bearing platform and corresponds to the lower part of each longitudinal assembly through hole, an annular inner limiting groove with a built-in lower anchorage device is formed in the inner side surface of each longitudinal assembly blind hole, a lower metal corrugated pipe is fixedly inserted into each longitudinal assembly blind hole, the lower end of each prestressed steel strand is connected with the interior of the side span bearing platform by being inserted into each longitudinal assembly blind hole, and a steel backing plate is installed between the lower end of each tensioning jack and the upper end, The upper surface of the side span bearing platform is provided with a top counterweight groove internally provided with a top counterweight device.
Further, in order to promote the internal assembly degree and stability, top counter weight inslot bottom surface on have arc bottom non-slip raised, top counter weight inslot medial surface on have arc side direction non-slip raised, top counter weight device upper and lower surface seted up arc bottom assembly groove, top counter weight device lateral surface on seted up with arc side direction non-slip raised matched with arc side direction assembly groove.
Furthermore, in order to reduce lateral wind resistance, lateral wind guide inclined planes are arranged on two sides of the lower surface of the side span bearing platform.
Furthermore, for convenience of assembly and cost reduction, the size of the cross section of the upper metal corrugated pipe is the same as that of the cross section of the lower metal corrugated pipe.
Furthermore, in order to improve the assembly stability, no gap exists between the outer side surface of the prestressed steel strand and the inner connecting surfaces of the upper metal corrugated pipe and the lower metal corrugated pipe.
Further, in order to improve the stability of the connecting end, a bottom base plate is arranged between the upper surface of the side span bearing platform and the lower surface of the side span beam section, an arc-shaped lateral limiting groove matched with the prestressed steel strand is formed in the bottom base plate, and an arc-shaped limiting block matched with the arc-shaped bottom assembling groove is arranged on the lower surface of the bottom base plate.
The utility model has the advantages that the auxiliary device for the side span counterweight of the unbalanced continuous beam is arranged at the lower end of the outer side of the side span beam section through the prestressed steel strand and the tensioning jack, the number and the position of the counterweight prestressed steel strand and the anchoring depth of the side span bearing platform can be freely configured according to requirements, the structural design is more reasonable, the top counterweight groove with the built-in top counterweight device is arranged on the upper surface of the side span bearing platform, the accurate counterweight can be carried out in real time aiming at the unbalanced load, the structural balance of the beam body is stable, safe and reliable, the side span bearing platform and the lower foundation can be used as the ground anchor of counterweight back pressure, enough anchoring force can be provided, the counterweight construction is safe and stable, the counterweight can be applied by the jack in batches by stages in real time, the counterweight weight is accurate, the counterweight process is continuous, the side span, the stress state is safe and stable, large-scale hoisting equipment is not needed in the whole counterweight construction, the demand of auxiliary constructors is small, the operability is high, the continuity is strong, the construction efficiency is high, the construction period is short, the cost is saved, and the construction safety is high.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a cross-sectional view of the present invention.
Fig. 3 is a partial schematic view of the connecting end of the middle tension jack of the present invention.
Fig. 4 is a partial schematic view of the position of the longitudinal blind assembly hole of the present invention.
Fig. 5 is a force diagram according to the present invention.
In the drawing, 1, an edge-span bearing platform, 2, a tensioning jack, 3, an edge-span beam section, 4, a mid-span beam section, 5, a longitudinal assembly through hole, 6, a prestressed steel strand, 7, an upper metal corrugated pipe, 8, a longitudinal assembly blind hole, 9, a lower anchorage device, 10, an internal limiting groove, 11, a lower metal corrugated pipe, 12, a steel backing plate, 13, an upper anchorage device, 14, a top counterweight device, 15, a top counterweight groove, 16, a bottom antiskid bulge, 17, a lateral antiskid bulge, 18, a bottom assembly groove, 19, a lateral assembly groove, 20, a lateral wind guide inclined plane, 21, a bottom backing plate, 22, a lateral limiting groove and 23, an arc limiting block are arranged.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
The unbalanced continuous beam side span counterweight auxiliary device shown in the figures 1, 2, 3 and 4 comprises a side span bearing platform 1, a tensioning jack 2, a side span beam section 3 and a mid-span beam section 4, wherein 6 longitudinal assembly through holes 5 are formed in the side span beam section 3, an upper metal corrugated pipe 7 with a built-in prestressed steel strand 6 is inserted into each longitudinal assembly through hole 5, the upper end of the prestressed steel strand 6 penetrates through the inside of the tensioning jack 2 to be connected with the tensioning jack 2, a longitudinal assembly blind hole 8 is formed in the upper surface of the side span bearing platform 1 corresponding to the lower part of each longitudinal assembly through hole 5, an annular inner limiting groove 10 with a built-in lower anchor 9 is formed in the inner side surface of each longitudinal assembly blind hole 8, a lower metal corrugated pipe 11 is fixedly inserted into each longitudinal assembly blind hole 8, the lower end of the prestressed steel strand 6 is connected with the inside of the side span bearing platform 1 by being inserted into each longitudinal assembly blind hole 8, a steel backing plate 12 is installed between the lower, The upper surface of the side span bearing platform 1 is provided with a top counterweight groove 15 internally provided with a top counterweight device 14.
Further, in order to improve the internal assembly degree and stability, the bottom surface in the top counterweight groove 15 is provided with an arc-shaped bottom antiskid lug 16, the inner side surface of the top counterweight groove 15 is provided with an arc-shaped lateral antiskid lug 17, the upper surface and the lower surface of the top counterweight device 14 are provided with arc-shaped bottom assembly grooves 18, the outer side surface of the top counterweight device 14 is provided with an arc-shaped lateral assembly groove 19 matched with the arc-shaped lateral antiskid lug 17, further, in order to reduce lateral wind resistance, two sides of the lower surface of the side bearing platform 1 are provided with lateral wind guide inclined planes 20, further, in order to facilitate assembly and reduce cost, the size of the cross section of the upper metal corrugated pipe 7 is the same as that of the cross section of the lower metal corrugated pipe 11, further, in order to improve the assembly stability, no gap exists between the outer side surface of the prestressed steel strand, in order to improve the stability of the connecting end, a bottom base plate 21 is arranged between the upper surface of the side span bearing platform 1 and the lower surface of the side span beam section 3, an arc-shaped lateral limiting groove 22 matched with the prestressed steel strand 6 is arranged on the bottom base plate 21, an arc-shaped limiting block 23 matched with the arc-shaped bottom assembling groove 18 is arranged on the lower surface of the bottom base plate 21, the side span counterweight auxiliary device of the unbalanced continuous beam of the utility model is arranged at the lower end of the outer side of the side span beam section 3 through the prestressed steel strand 6 and the tensioning jack 2, the number, the position and the anchoring depth of the counterweight prestressed steel strand 6 on the side span bearing platform 1 can be freely configured and designed according to requirements, the structural design is more reasonable, the top counterweight groove 15 with the built-in top counterweight device 14 is arranged on the upper surface of the side span bearing platform 1, the side span bearing platform 1 and the lower part foundation are used as ground anchors of counter weight back pressure, enough anchoring force can be provided, counter weight construction is safe and stable, the jack can be used for tensioning and applying counter weights in batches in real time in stages, the counter weight is accurate, the counter weight loading process is continuous, the prestressed steel strand 6 is used for counter pressure unbalance continuous beam side span beam section 3, the stress state is safe and stable, large-scale hoisting equipment is not needed in whole counter weight construction, the demand of auxiliary constructors is small, the operability is high, the continuity is strong, the construction efficiency is high, the construction period is short, the cost is saved, and the construction safety is high.
The construction steps are as follows:
firstly, finite element simulation analysis is carried out on each unbalanced construction stage of the unbalanced continuous beam by using finite element software midas civil, the counterweight which needs to be applied to the side span beam end in each unbalanced construction stage is calculated, and the number and the position of the side span counterweight prestressed steel strands 6 and the anchoring depth of the side span bearing platform 1 are designed. In each unbalanced construction stage, the unbalanced continuous beam is stressed in a balanced manner under the action of the balance weight, the bending moment is zero, and no unbalance load is generated on the bridge pier; as shown in fig. 5, the side span weight F3, the side span beam segment resultant force F1, the mid-span beam segment resultant force F2, F1 × L1+ F3 × (L1 + L3) = F2 × L2.
And secondly, pre-burying a counterweight prestressed steel strand 6, an anchor backing plate and an anchorage device when the side span bearing platform 1 is constructed according to the number and the positions of the prestressed steel strands obtained through finite element simulation analysis, and sleeving the prestressed steel strand 6 by using a metal corrugated pipe so that the prestressed steel strand 6 is isolated from the side span bearing platform 1 by concrete. The side span bearing platform 1 and the lower foundation are used as ground anchors for counter weight back pressure of the side span beam section 3, sufficient anchoring force is provided for counter weight back pressure, and the whole anchoring structure is firm and safe.
And thirdly, vertically penetrating the counterweight prestressed steel strand 6 through a beam body when the side span beam section 3 is constructed in a side span closure section, sleeving the prestressed steel strand 6 on a metal corrugated pipe to be isolated from the concrete of the beam body, installing a steel backing plate 12, an anchor backing plate, an anchor and a tensioning jack 2 on the concrete surface of the beam section, diffusing the counterweight action range of the steel backing plate 12, and temporarily anchoring the beam section by the anchor backing plate and the anchor.
And fourthly, according to the balance weight required by each unbalanced construction stage of the midspan girder section 4, applying balance weight to the side span girder section 3 by the symmetrical tensioning jacks 2 in stages and in batches to enable the side span and the midspan of the unbalanced continuous girder to reach stress balance, and arranging a special person to carry out monitoring measurement to ensure that no unbalance load is generated between the pier and the whole continuous girder.
And fifthly, after the concrete pouring and the prestress tensioning and grouting of the middle-span closure section of the unbalanced continuous beam are finished, the side-span counterweight prestressed steel strand 6 is subjected to batch symmetrical top withdrawal unloading, and the side-span counterweight loading unloading construction of the unbalanced continuous beam is finished.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (6)
1. The utility model provides an unbalanced continuous beam side span counter weight auxiliary device, includes side span cushion cap (1), stretch-draw jack (2), side span beam section (3) and midspan beam section (4), characterized by: the side span beam section (3) is internally provided with a plurality of longitudinal assembly through holes (5), the longitudinal assembly through holes (5) are internally inserted with an upper metal corrugated pipe (7) internally provided with prestressed steel strands (6), the upper ends of the prestressed steel strands (6) penetrate through the interior of the tensioning jack (2) to be connected with the tensioning jack (2), the upper surface of the side span bearing platform (1) is correspondingly provided with longitudinal assembly blind holes (8) below the longitudinal assembly through holes (5), the inner side surface of each longitudinal assembly blind hole (8) is provided with an annular inner limiting groove (10) internally provided with a lower anchorage device (9), the longitudinal assembly blind holes (8) are internally and fixedly inserted with lower metal corrugated pipes (11), the lower ends of the prestressed steel strands (6) are connected with the interior of the side span bearing platform (1) by being inserted into the longitudinal assembly blind holes (8), the side span bearing platform is characterized in that a steel backing plate (12), an anchor backing plate and an upper anchor (13) are arranged between the lower end of the tensioning jack (2) and the upper end of the side span beam section (3), and a top counterweight groove (15) with a built-in top counterweight device (14) is formed in the upper surface of the side span bearing platform (1).
2. The unbalanced continuous beam endbay counterweight auxiliary device of claim 1, wherein: top counter weight groove (15) in the bottom surface on have arc bottom non-skid protrusion (16), top counter weight groove (15) medial surface on have arc side direction non-skid protrusion (17), top counter weight device (14) upper and lower surface seted up arc bottom assembly groove (18), top counter weight device (14) lateral surface on seted up with arc side direction non-skid protrusion (17) matched with arc side direction assembly groove (19).
3. The unbalanced continuous beam endbay counterweight auxiliary device of claim 1, wherein: lateral air guide inclined planes (20) are arranged on two sides of the lower surface of the side span bearing platform (1).
4. The unbalanced continuous beam endbay counterweight auxiliary device of claim 1, wherein: the size of the cross section of the upper metal corrugated pipe (7) is the same as that of the cross section of the lower metal corrugated pipe (11).
5. The unbalanced continuous beam endbay counterweight auxiliary device of claim 1, wherein: and no gap is reserved between the outer side surface of the prestressed steel strand (6) and the inner side connecting surfaces of the upper and lower metal corrugated pipes.
6. The unbalanced continuous beam endbay counterweight auxiliary device of claim 1, wherein: the side span bearing platform is characterized in that a bottom base plate (21) is arranged between the upper surface of the side span bearing platform (1) and the lower surface of the side span beam section (3), an arc-shaped lateral limiting groove (22) matched with the prestressed steel strand (6) is formed in the bottom base plate (21), and an arc-shaped limiting block (23) matched with the arc-shaped bottom assembling groove (18) is arranged on the lower surface of the bottom base plate (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920882501.5U CN210151589U (en) | 2019-06-12 | 2019-06-12 | Unbalanced continuous beam side span counterweight auxiliary device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920882501.5U CN210151589U (en) | 2019-06-12 | 2019-06-12 | Unbalanced continuous beam side span counterweight auxiliary device |
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| CN210151589U true CN210151589U (en) | 2020-03-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920882501.5U Withdrawn - After Issue CN210151589U (en) | 2019-06-12 | 2019-06-12 | Unbalanced continuous beam side span counterweight auxiliary device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110106793A (en) * | 2019-06-12 | 2019-08-09 | 中铁四局集团第二工程有限公司 | Uneven continuous beam end bay counter-weight assist device |
-
2019
- 2019-06-12 CN CN201920882501.5U patent/CN210151589U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110106793A (en) * | 2019-06-12 | 2019-08-09 | 中铁四局集团第二工程有限公司 | Uneven continuous beam end bay counter-weight assist device |
| CN110106793B (en) * | 2019-06-12 | 2024-01-09 | 中铁四局集团有限公司 | Unbalanced continuous beam side span counterweight auxiliary device |
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